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post #91 of 219 Old 10-01-2018, 05:36 PM - Thread Starter
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Originally Posted by Ash Sharma View Post
Yes the attic in my case is an unconditioned space and gets super hot in summer although the attic has 12 feet of open space above it (a very tall person can walk around and still have a few feet above him) - if yours is conditioned that would be a huge benefit - also I know you are up North so don't get the brutal high temps we get in the South.

I could add a supply to the hush box from under it - my hush box in not in the theater but in the lobby behind it (designed by Dennis Erskine) but in my case the supply is from the Theater (which runs at 72 to 74 F) through the projector port - pushes through he projector and the exhaust of the projector is ducted up as the return where the active thermal fan (system 1) pulls the air out in the attic (which is unconditioned)...

It is a crap shoot - if the room is very quiet (which I am sure yours will be) you will hear the projector unless your guys can defy the laws of physics..
Very true Ash
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post #92 of 219 Old 10-01-2018, 05:37 PM
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Nice Find Donald on Draper Silent partner, thanks! Ductless is big positive. I’ll run this past Nyal.

https://www.draperinc.com/documentdo...rtner_0818.pdf
A glass in front of the projector glass ... 'Blasphemy'...
And I have the DCR Palladin A Lens - no way to install it ...
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post #93 of 219 Old 10-01-2018, 05:41 PM
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The tempest one is also designed for locations where one can't bring (new) ducting to the enclosure.

Edit: Forum software placed the /ur l wrongly reslting in an 403 error page: https://www.avinteractive.com/news/p...018-18-01-2018.

Ductless to accomodate existing structures.

There are others in the Sony 815/Barco Thor class, even with their own lifts, so commercial theaters don't loose floor space/seating area. A few years ago Peter even found an enclosure maker that had designed an enclosure with a periscope to hide the projector above the room.

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post #94 of 219 Old 10-01-2018, 06:03 PM
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Quote:
Originally Posted by Ash Sharma View Post
A glass in front of the projector glass ... 'Blasphemy'...
And I have the DCR Palladin A Lens - no way to install it ...
I know truthfully it is almost the only way to retain a free moving lens while containing the noise and heat. Wolfgang managed to construct a hole for his previous projectors' lenses from machined printboard material. But if one went with underpressurising the cabinet by removing hot air, one draws in dusty air. Of course projectors are well filtered these days, but still

But a good point to consider when adapting such an enclosure, either by its manufacturer or aftermarket party/DIY, see if it can be done without port glass.
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post #95 of 219 Old 10-01-2018, 06:26 PM - Thread Starter
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Quote:
Originally Posted by Ash Sharma View Post
A glass in front of the projector glass ... 'Blasphemy'...
And I have the DCR Palladin A Lens - no way to install it ...
If we construct our own hushbox there will not be portglass.|
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post #96 of 219 Old 10-01-2018, 06:28 PM - Thread Starter
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Quote:
Originally Posted by donaldk View Post
I know truthfully it is almost the only way to retain a free moving lens while containing the noise and heat. Wolfgang managed to construct a hole for his previous projectors' lenses from machined printboard material. But if one went with underpressurising the cabinet by removing hot air, one draws in dusty air. Of course projectors are well filtered these days, but still

But a good point to consider when adapting such an enclosure, either by its manufacturer or aftermarket party/DIY, see if it can be done without port glass.
The Sony has a lens case so the the hushbox can seal at the lens outer ring casing and allow free lens movement
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post #97 of 219 Old 10-01-2018, 06:33 PM
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If we construct our own hushbox there will not be portglass.|
Lon,
To me... this is the biggest problem to be solved in this hobby
If it is true that once you poke a pin hole in a fish tank - all the water will flow out...so will sound ...in a room with a exposed outlet such as a hush box with a duct..
How can you stick a projector in a perfect room and provide a path for air flow (unless it is Donald's Draper gizmo suggestion with a port glass) and expect the sound not to escape out??
And how can the projector be silent?
You have the dream team - so I am super curious how you will solve this biggest problem..
Ash
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post #98 of 219 Old 10-01-2018, 06:47 PM
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Can you wrap the duck with a double application with something similar to Dynamat?

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post #99 of 219 Old 10-02-2018, 06:02 AM - Thread Starter
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Just wondering if anyone had experience with this hush box manufacturer?
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post #100 of 219 Old 10-05-2018, 03:01 AM
 
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Can you wrap the duck with a double application with something similar to Dynamat?

That would probably be classified as animal cruelty!
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post #101 of 219 Old 10-05-2018, 05:07 AM
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As long as there is some space in front you can use glass. I have two side by side and an auxiliary fan module with three extremely quiet fans blow ambient air from beneath. Intake air stays around 70 degrees exhaust at about 85 degrees both running full laser. This would of course require a separate supply to the box with duct fans likely but I'm confident it's doable and have it completely enclosed from the theater side.


The 1mm thick glass from Edmund Scientific has no significant change to the projector image.


Art
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post #102 of 219 Old 10-05-2018, 05:29 AM - Thread Starter
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Quote:
Originally Posted by Art Sonneborn View Post
As long as there is some space in front you can use glass. I have two side by side and an auxiliary fan module with three extremely quiet fans blow ambient air from beneath. Intake air stays around 70 degrees exhaust at about 85 degrees both running full laser. This would of course require a separate supply to the box with duct fans likely but I'm confident it's doable and have it completely enclosed from the theater side.


The 1mm thick glass from Edmund Scientific has no significant change to the projector image.


Art
Thanks Art, that is one of the options, running supply and return ducts to a conditioned area within the house. My plan would be to have two different front's to the box made, one with Edmund optical glass, angled to reduce reflections, and another front without optical glass but airtight to lens outer ring, and then try both. The lens fronts need to be designed to remove as this is how we would access the projector.
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post #103 of 219 Old 10-05-2018, 06:01 AM
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DT Hush Box Medium



Just one of our options. - this is for the Barco Balder and Loki. We can do an option without porthole glass as well if required!

Neil Davidson - DT Screens
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post #104 of 219 Old 10-05-2018, 07:59 AM
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Quote:
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That would probably be classified as animal cruelty!
I thought a duck was in the duct
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post #105 of 219 Old 10-15-2018, 06:16 AM - Thread Starter
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Construction update
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post #106 of 219 Old 10-25-2018, 05:26 AM - Thread Starter
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Extension rocked, ceiling speaker runs in place, front screen wall wiring in place, next up, front wall install.
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post #107 of 219 Old 10-25-2018, 05:28 AM - Thread Starter
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Front wall build
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post #108 of 219 Old 11-04-2018, 09:16 AM - Thread Starter
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Front Wall complete and primed, ready for Paint, Fiberglass Batt and Arithmetic panels.
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post #109 of 219 Old 11-17-2018, 09:17 AM - Thread Starter
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Front Wall complete, M2's and Seaton subs installed. Locations to be tweaked next week
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post #110 of 219 Old 11-17-2018, 11:47 AM
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Lon

You using the JBL SDP-75 or Altitude?

Looking good!

What are your room dimensions?

Goodbye to a great audio and video genius and writer... JOHN GANNON. I enjoyed your friendship, wit and a nice long run we took around Indianapolis at CEDIA years back... and for buying my Runco 980 Ultra years back... you saved my ass! Rest in peace.
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post #111 of 219 Old 11-17-2018, 12:41 PM - Thread Starter
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Lon

You using the JBL SDP-75 or Altitude?

Looking good!

What are your room dimensions?
Sdp-75, 18x25 screen to back wall
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post #112 of 219 Old 11-17-2018, 01:01 PM
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Sdp-75, 18x25 screen to back wall
Almost identical systems - and room sizes… Can't wait to hear about it when you're up and running.

Who's doing your calibration?

Goodbye to a great audio and video genius and writer... JOHN GANNON. I enjoyed your friendship, wit and a nice long run we took around Indianapolis at CEDIA years back... and for buying my Runco 980 Ultra years back... you saved my ass! Rest in peace.
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post #113 of 219 Old 11-17-2018, 02:57 PM - Thread Starter
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Curt Hoyt has been involved in the project from day 1 with the ultimate goal of him tuning the final system based on his specifications for speaker count, locations, and angles. Curt was also consulted in the hardware selections.
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post #114 of 219 Old 11-17-2018, 06:57 PM
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I'm not going to say I'm as excited as you guys about your upcoming rooms but I bet I'm close behind. It is going to be a lot of fun in the coming months !


Art
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post #115 of 219 Old 11-25-2018, 07:09 AM
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Front Wall complete, M2's and Seaton subs installed. Locations to be tweaked next week
Looks great!

Never seen subs and mains side by side like that in a baffle wall. Any pics of the sides and ceiling? Curious to see 708i on the sides and how SCL 4’s are placed on the ceiling.

Also can you share the exact model of the Mark Levinson you chose for the horn section of M2? Any listening impressions yet compared to theta’s?
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post #116 of 219 Old 11-25-2018, 04:01 PM
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Front Wall complete, M2's and Seaton subs installed. Locations to be tweaked next week
Hi Lon,

It looks really great. When are you shooting for, for the grand opening?

Bryan
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post #117 of 219 Old 11-26-2018, 05:42 AM - Thread Starter
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Looks great!

Never seen subs and mains side by side like that in a baffle wall. Any pics of the sides and ceiling? Curious to see 708i on the sides and how SCL 4’s are placed on the ceiling.

Also can you share the exact model of the Mark Levinson you chose for the horn section of M2? Any listening impressions yet compared to theta’s?
The SCL4's will be ear level, the 708i's will be ceiling mounted. Next up is the Riser, then the sides and cieling speakers will be installed. I have ML 531's and 532's planned for the M2's both horn and Low. This can be changed once everything is installed to allow simple swapping of speaker wires to allow any amp to power any speaker, horn/ Low.

The system has not been fired up yet, we will most likely fire it up after all the other dust-related work is complete. Then Curt will remotely assist in setting the front M2's.
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post #118 of 219 Old 11-26-2018, 05:46 AM - Thread Starter
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Hi Lon,

It looks really great. When are you shooting for, for the grand opening?

Bryan
Thanks Bryan:

I am hoping by Super Bowl. The project engineer Eric Chuderewicz will be down to tomorrow to assist with final riser, seating, speaker, lighting, as built locations. Once that is done we can move quickly to finish the shell.
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post #119 of 219 Old 11-26-2018, 07:50 AM
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What was the reason the M2s were mounted upside-down? I assume it's something to do with dispersion in your particular room?

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post #120 of 219 Old 11-26-2018, 08:07 AM
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The SCL4's will be ear level, the 708i's will be ceiling mounted. Next up is the Riser, then the sides and cieling speakers will be installed. I have ML 531's and 532's planned for the M2's both horn and Low. This can be changed once everything is installed to allow simple swapping of speaker wires to allow any amp to power any speaker, horn/ Low.

The system has not been fired up yet, we will most likely fire it up after all the other dust-related work is complete. Then Curt will remotely assist in setting the front M2's.
Thanks for the update. Awesome build and equipment and very inspiring. Thanks for sharing.

I am looking at something similar for my HT. Have already decided on M2s for my LCR and 705i for ceiling. Ear level is what I am still working on. 708i is too deep for my room and so am looking for something tall and lean for ear level. SCLs fit the bill, but they are expensive.

Not sure if you ever considered Theta Prometheus for your M2 LFE. I am looking at that as an option. If you considered the Prometheus or Dreadnaught D for M2s, but decided against it in favor of ML, I would love to hear your perspective and reasoning.
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